PU leather is synthetic leather, made to feel, look and display properties similar to genuine leather. It is used in place of leather to make shoes, bags, furniture, balls, luggage -- anything genuine leather can be used for. You can find more information here: http://www.puleather.com/
PU leather is a synthetic imitation leather made by Wet Process. It has the same feel, look and properties of real leather. This is also considered a Vegetarian Leather, it's very comfortable to wear and breathes well. For more information look here: http://www.puleather.com/
Tricky-Dust stated on ask.com that: "PU leather is also known as bicast leather. It consists of strips of leather which have been treated with polyurethane. It is more inexpensive than genuine leather that is in one piece and is commonly used in furniture." Therefore it would not be vegetarian if this information is correct.